Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcae344a25913ff…

MALICIOUS

PDF

39.2 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 7479bc12cfd8126f35c15bee5056ea2e SHA-1: c149bb5367b85b62ccbee8a6bc1ada6cf5e66730 SHA-256: dbcae344a25913ffc9f05ddc34a3638691a415f3d788d18c821d5040720011af
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a method to distribute malicious content. The ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or malicious distribution intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://businessempoweredstyle.com/uploads/1/3/0/7/130739363/6023892.pdf In PDF document text
    • http://www.offdutyclub.com/uploads/1/3/0/5/130588769/kegimofavijav.pdfIn PDF document text
    • http://www.internalrevolution.us/uploads/1/3/0/7/130776781/8937951.pdfIn PDF document text
    • http://mlhas.com/uploads/1/3/0/6/130620282/wexebuwak.pdfIn PDF document text
    • http://sellerfriend.com/uploads/1/3/0/4/130436415/2739d4.pdfIn PDF document text
    • http://www.villifarmi.com/uploads/1/3/0/2/130287538/7802282.pdfIn PDF document text
    • http://virtuosoperformingartstheatre.com/uploads/1/3/0/7/130775917/gudadalosowom.pdfIn PDF document text
    • http://plussizeweddingdressesmassachusetts.com/uploads/1/3/0/2/130287932/wufeg.pdfIn PDF document text
    • http://74-123-72-248.mgwnet.com/uploads/1/3/0/6/130639946/5e81c98.pdfIn PDF document text
    • http://nexgenmarketingagency.com/uploads/1/3/0/6/130605306/vesuregizolivab-fewosilijonuka-votiba.pdfIn PDF document text
    • http://ingridsolbrig.com/uploads/1/3/0/5/130590469/zubeguwagamu.pdfIn PDF document text
    • http://pluglifeintl.com/uploads/1/3/0/7/130776177/2ab6bf2a9213e28.pdfIn PDF document text
    • http://youngartistmemphis.com/uploads/1/3/0/6/130640071/valukapatusegariw.pdfIn PDF document text
    • http://chinawindow.biz/uploads/1/3/0/2/130288479/6977386.pdfIn PDF document text
    • http://just1gems.com/uploads/1/3/0/5/130547340/fuwofuj.pdfIn PDF document text
    • http://peelerapp.com/uploads/1/3/0/5/130550758/66186.pdfIn PDF document text
    • http://weightlosscoachfouryou.com/uploads/1/3/0/3/130379422/130379422.html#qs+world+university+rankings+2020+listIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3968 10244 bytes
SHA-256: cd9594d6aeed2ee9b6476141016dc3261b33239fa7611d42cede71fdefa45d4c